Trolley head



Nov. 6, 1928. 1,690318 H. P. CHANDLER TROLLEY HEAD Filed Aug. 25, 1927Inventor 7 11 0mm? P. CHANDLEE 7 By v Attorney Patented Nov. 6, 1928,

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HOMBRE. CI-ZANDLER; OF MANSFIELD, OHIQ-ABSIGNQRWO THE OHIO :BRASSCOMPANY,

OF MANSFIELD, OHIO; A CORPORATION: OF NEW JERSEY. H

TROLIQEY HEAD.

My invention relates to trolley heads and particularly to that type lznown a's alining heads. r r I i The object of my inventionis to providea head in which the, portion which supports the trolley wheel orcollector may swivel with respect to the pole asthe car moves out ofalinement with the trolley wire, and also to provide means for tendingto maintain the alinement of: the trolley wheel with respect to thepole.

A'furtherobject of contact between parts. i

In the drawing accompanying this spec.- ification:

Fig. 1:i s a side viewof my trolley head'in partialsection to show theswivelparts, and it is also shown asmountedupon the end of to provide alarge area the relatively movable a pole.

Fig. 2 is a sectional view on the line 22 of Fig. 1.

In the preferred embodiment of my invention I employ a pole casting ormember 1 which is arranged to be secured to the end rot the trolley poleor other support 2 by means of the bolt and washer 3. There are varioustypes of connections between the members 1 and 2 which may be used, butthe one shown will provide a practical connec tion.

Mounted upon the upper end of the pole casting 1 is a hollow member 4having a side opening 5 and the top and bottom openings 6 and 7respectively. The member 4: has a flat surface or top, although thissurface may be curved if desired. The cross section of the member l iscylindrical. This permits the collector support 8 to be mounted upon themember 4t and rotate relative thereto. The collector support 8 comprisesan inverted cup-shaped member 9, the inner surface of which its theouter surface of the member 4 and makes good contact therewith. Thisgives a large area of contact between the parts, which reduces thecurrent per square inch which these surfaces must carry, and avoids thenecessity of using a flexible copper connection between the members 1and 8. Where the contact between members corresponding to the memi and 8is small and the current carry-- iargy'c fi er unit area contact, it isfound lector 16, and the upper ends of vment when the car is Applicationfilcd August 23, 1927. Serial no. 214,847,

that there is very likely to be considerable V Mounted within the hollowmember is a'helical sprinwlO, the ends 11 of which pmof the opening 5.The member 9 is also provided with anopening 12 and theedges ofthespringl The member S'is provided with an openin'gi13, which registerswith the openings "is a bolt or; axle l l; which main tudinally;

The openings 5 and 12'register with each ings in alinement' when thedevice is operating" under normal conditions, that is,

poleand trolley head and extends-in the di rection of travel of the car.

arms 15, one on each side of the current colwhich are pitting oi themovable surfaces. ject laterallytiieretrom and engage the'e'dges thisopening. also may'engage the endsll of openings 6'and 7, and mountedwithin these tains the parts against separation longiother and thespring '10 maintains the open when the trolley wire is directly over theMounted upon the member 9 are spaced held in place by connected by theaxle 17 the spring cotter 18.

The member 4 is mounted at such an angle with respect to the axis of thepole 2 that under normal operating conditions the ver 'tical axis of themembers i and 14 will sub stantially at all times be in a verticalposition. The upward pressure of the pole 2, which is brought about bymeans of a spring operated trolley base tends to maintain contactbetween the surfaces of the parts 4; and 9 when the current collectorengages a trolley wire, and, therefore, it is not neces sary to draw thenut 19 very tight.

My improved head will permit the car to round a curve and the groove inthe current collector maintain its alinement with the trol ley wirewhile rounding the curve and reduce friction and wear between thecollector 16 and the trolley wire, and the spring 10 is biased to movethe members 1 and Sinto and yieldingly maintain the members in alinemoving on a straight track.

If the spring ends do not normally engage both edges of both hollowmember openings 5 and 12, the device is still practical, but therewillbe a small rotative movement of the members from oormah that weentical central openings a pin the art will readily the car is moving inalinement with the trolley Wll8,.Wl11Cl1 will not be restrained bythesprmg and this movement Wlll. amount to the difference in the widthof the openings 5 and 12. I

Themembers 4 and 9 inter-engage to pre:

vent lateral displacement and if the collecting device did not at timesleave the wire jwhile moving relative thereto, it would not be necessaryto use the axle bolt 14 as the upward pressure of the polewou'ld at alltimes maintain the, parts against ,longitu chnal dlsplacement wh le inuse.

There are modifications which one skilled disclosure, but I wishto belimited only by myjclainis; a '1 "I elaim: I

f l. -A trolley head eomprising a pole casting. having a hollow;-projecting member,

mean s passing through the registeringopen ings tohold the said partstogether in re? ,tative, relation, a helicalspring mounted endsprojecting in predetermined relation.

2 side opening understand; from my said projecting member with itslaterally and engaging the edges of the walls formingthe sideopenings inthe saidparts and adapted to yieldingly hold the pole casting and thefirst the harp member 2. A trolley headrcomprising a pole cast 'inghaving ahollow member with smooth exterior side walls of circularformation, a and a spring mounted 1n the hollow me'mberand lts endsengaging the .side walls of the openings, the hollow mem ber having afiat top with a holethrough the topto receive an axle, a harpmemberhav-- ing spaced arms to receive a current collector andh aving aninverted cup-shaped member to fit overthe said hollow member and haveits interior side walls Contact with the exterior'side Walls of thehollow member and the exterior fiat surface of the hollowmeniberengaging with the inner top surface, of the inverted member,aside opening to the inverted member and the walls of whiehfengage withthe ends of the spring biased to return the parts'to their normalpredetermined relative position and an open- 1 ing in the invertedmember to receive the axle. 7 I In testimony vwhereof Iatlix mysignature.

' i HOMER 'P. CHANDLER.

